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Seventeen-year-old Ottavia sails from Genoa to Palermo to try to negotiate trade between his father's house and the Arabs. Immidediately upon his arrival he becomes involved with a mysterious band of vagabonds. He is in danger, his house is looted and he feels he can trust no one except the six-year-old King of Sicily. He doesn't even know why... more » the Silver Disk is so important or what it means. The boys are brave and are victorious in several exciting battles.« less